Not sure what I'm missing, but

#!c:\perl\bin\perl.exe 

use strict;
#use CGI::Carp qw(fatalsToBrowser);
use CGI;
use warnings;

print $CGI->redirect('http://localhost/rbsaws/');
[download]

produces a "CGI Error The specified CGI application misbehaved by not returning a complete set of HTTP headers." for me.